Today I purchased an inlet manifold for my car to do the conversion. I managed to pick it up compete with both Adjustor Units for £170. Its used and from a bmw z4 3.0s. Now I think iv had a bit of a barging for the power gain I will get after a remap but if I have been mugged off then please tell me.

Anyway by looking at the threads on this conversion it looks fairly straight forward to do unlike when I dropped 2 turbos into my 350z . Now the inlet should arrive to me on Monday as well as the new gaskets so I cant upload any pics as of yet but I will as soon as it arrives.

The part number On the z4 inlet was the same as the one needed so I hope it works. I know my 325I is a 3.0 as its stated on my log book and I'm pretty sure it doesn't have a 3 stage intake as there's plugs for the valve adjusters that aren't connected to anything. Also it would be the only reason why the cars power is restricted so much compared to the 330I.

Ok so I cleaned out the inlet manifold today after receiving it full of crap. In the processes of this I found what the difference is between the 330i and the 325i manifolds. There are too electronic controlled flaps which control the air flows. very interesting how it all works in this manifold, rather clever if I must say so myself compared to the 325i one .

Anyway iv cleaned it all up now and taken some pics for you guys. Ill be fitting it into my car the end of next week once its all dried out.

4 short screws go to the bigger adjuster and then On the small adjuster you have a small one, a medium one and a long one which you have to put in the opposite side of the manifold to the small adjuster.